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Does alternator wire go to positive or negative?


How do you hook up alternator wires?


What is the blue wire on my alternator for?

An alternator needs a 12v supplied circuit to ‘excite’ the windings so it can start to charge. This blue wire comes from the one side or the alternator light and the other side of the light comes from switched 12v+ supply. So in other words – this wire supplies that exciter circuit.


Does an alternator have a ground wire?

The last wire that will need improvement is the ground wire from the battery to the engine block. The alternator is grounded to the engine block by its mounting points so the engine block itself becomes an electrical ground distribution block. You just need to find a suitable bolt to secure your additional ground wire.


What is the difference between 1 wire and 3 wire alternator?

Striking a compromise between functionality and looks is a battle that can arise when it comes to choosing an alternator. While the 1-wire units offer clean and simple installation with minimally visible wiring, the OE-style 3-wire units can provide better electrical performance for the demands of your hot rod.


Can you hook up an alternator backwards?

(2) there is no way to hook the alternator up backwards. You alternator has the BATT post (main (+) output) and the two field terminals.


What is B on an alternator?

Locate the terminal on the alternator labeled “B”, “Bat” or “Pos.” All alternators have this terminal. The wire that connects to it is red and goes to the battery. It is a heavy duty wire as it has to carry high current.

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What does the D+ terminal on an alternator do?

The D+ signal wire is used as an on and off switch for these devices, its main purpose is to send a 12V+ signal to the device when the vehicle is running.


How do you install a 3 wire alternator?


How do you wire a 2 wire alternator?